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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2011 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: SimpleItem.html 883 2014-05-07 02:45:34Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.dellroad.stuff.vaadin7;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import java.util.Collection;<a name="line.10"></a>
<span class="sourceLineNo">011</span>import java.util.HashSet;<a name="line.11"></a>
<span class="sourceLineNo">012</span>import java.util.Set;<a name="line.12"></a>
<span class="sourceLineNo">013</span><a name="line.13"></a>
<span class="sourceLineNo">014</span>/**<a name="line.14"></a>
<span class="sourceLineNo">015</span> * Simple read-only {@link com.vaadin.data.Item} implementation backed by a Java object.<a name="line.15"></a>
<span class="sourceLineNo">016</span> *<a name="line.16"></a>
<span class="sourceLineNo">017</span> * &lt;p&gt;<a name="line.17"></a>
<span class="sourceLineNo">018</span> * Item {@link com.vaadin.data.Property}s are defined by {@link PropertyDef}s and retrieved by a {@link PropertyExtractor}.<a name="line.18"></a>
<span class="sourceLineNo">019</span> * &lt;/p&gt;<a name="line.19"></a>
<span class="sourceLineNo">020</span> *<a name="line.20"></a>
<span class="sourceLineNo">021</span> * &lt;p&gt;<a name="line.21"></a>
<span class="sourceLineNo">022</span> * Although the item properties are read-only from "above", they can be made mutable from "below" by modifying the<a name="line.22"></a>
<span class="sourceLineNo">023</span> * backing object and invoking {@link #fireValueChange fireValueChange()}.<a name="line.23"></a>
<span class="sourceLineNo">024</span> * &lt;/p&gt;<a name="line.24"></a>
<span class="sourceLineNo">025</span> *<a name="line.25"></a>
<span class="sourceLineNo">026</span> * @param &lt;T&gt; the type of the underlying Java object<a name="line.26"></a>
<span class="sourceLineNo">027</span> * @see AbstractQueryContainer<a name="line.27"></a>
<span class="sourceLineNo">028</span> * @see AbstractSimpleContainer<a name="line.28"></a>
<span class="sourceLineNo">029</span> */<a name="line.29"></a>
<span class="sourceLineNo">030</span>@SuppressWarnings("serial")<a name="line.30"></a>
<span class="sourceLineNo">031</span>public class SimpleItem&lt;T&gt; implements BackedItem&lt;T&gt; {<a name="line.31"></a>
<span class="sourceLineNo">032</span><a name="line.32"></a>
<span class="sourceLineNo">033</span>    protected final T object;<a name="line.33"></a>
<span class="sourceLineNo">034</span>    protected final PropertyExtractor&lt;? super T&gt; propertyExtractor;<a name="line.34"></a>
<span class="sourceLineNo">035</span><a name="line.35"></a>
<span class="sourceLineNo">036</span>    private final Object[] propertyList;                    // elements are either PropertyDef's or Property's<a name="line.36"></a>
<span class="sourceLineNo">037</span><a name="line.37"></a>
<span class="sourceLineNo">038</span>    /**<a name="line.38"></a>
<span class="sourceLineNo">039</span>     * Constructor.<a name="line.39"></a>
<span class="sourceLineNo">040</span>     *<a name="line.40"></a>
<span class="sourceLineNo">041</span>     * @param object underlying Java object<a name="line.41"></a>
<span class="sourceLineNo">042</span>     * @param propertyDefs property definitions<a name="line.42"></a>
<span class="sourceLineNo">043</span>     * @param propertyExtractor extracts the property value from {@code object}<a name="line.43"></a>
<span class="sourceLineNo">044</span>     * @throws IllegalArgumentException if any parameter is null<a name="line.44"></a>
<span class="sourceLineNo">045</span>     */<a name="line.45"></a>
<span class="sourceLineNo">046</span>    public SimpleItem(T object, Collection&lt;? extends PropertyDef&lt;?&gt;&gt; propertyDefs, PropertyExtractor&lt;? super T&gt; propertyExtractor) {<a name="line.46"></a>
<span class="sourceLineNo">047</span>        if (object == null)<a name="line.47"></a>
<span class="sourceLineNo">048</span>            throw new IllegalArgumentException("null object");<a name="line.48"></a>
<span class="sourceLineNo">049</span>        if (propertyExtractor == null)<a name="line.49"></a>
<span class="sourceLineNo">050</span>            throw new IllegalArgumentException("null propertyExtractor");<a name="line.50"></a>
<span class="sourceLineNo">051</span>        if (propertyDefs == null)<a name="line.51"></a>
<span class="sourceLineNo">052</span>            throw new IllegalArgumentException("null propertyDefs");<a name="line.52"></a>
<span class="sourceLineNo">053</span>        this.object = object;<a name="line.53"></a>
<span class="sourceLineNo">054</span>        this.propertyExtractor = propertyExtractor;<a name="line.54"></a>
<span class="sourceLineNo">055</span>        this.propertyList = propertyDefs.toArray();<a name="line.55"></a>
<span class="sourceLineNo">056</span>    }<a name="line.56"></a>
<span class="sourceLineNo">057</span><a name="line.57"></a>
<span class="sourceLineNo">058</span>    @Override<a name="line.58"></a>
<span class="sourceLineNo">059</span>    public T getObject() {<a name="line.59"></a>
<span class="sourceLineNo">060</span>        return this.object;<a name="line.60"></a>
<span class="sourceLineNo">061</span>    }<a name="line.61"></a>
<span class="sourceLineNo">062</span><a name="line.62"></a>
<span class="sourceLineNo">063</span>    @Override<a name="line.63"></a>
<span class="sourceLineNo">064</span>    @SuppressWarnings("unchecked")<a name="line.64"></a>
<span class="sourceLineNo">065</span>    public Property&lt;?&gt; getItemProperty(Object id) {<a name="line.65"></a>
<span class="sourceLineNo">066</span>        for (int i = 0; i &lt; this.propertyList.length; i++) {<a name="line.66"></a>
<span class="sourceLineNo">067</span>            final Object value = this.propertyList[i];<a name="line.67"></a>
<span class="sourceLineNo">068</span>            if (value instanceof PropertyDef) {<a name="line.68"></a>
<span class="sourceLineNo">069</span>                final PropertyDef&lt;?&gt; propertyDef = (PropertyDef&lt;?&gt;)value;<a name="line.69"></a>
<span class="sourceLineNo">070</span>                if (!propertyDef.getName().equals(id))<a name="line.70"></a>
<span class="sourceLineNo">071</span>                    continue;<a name="line.71"></a>
<span class="sourceLineNo">072</span>                final Property&lt;?&gt; property = this.createProperty(propertyDef);<a name="line.72"></a>
<span class="sourceLineNo">073</span>                this.propertyList[i] = property;<a name="line.73"></a>
<span class="sourceLineNo">074</span>                return property;<a name="line.74"></a>
<span class="sourceLineNo">075</span>            } else if (value instanceof Property) {<a name="line.75"></a>
<span class="sourceLineNo">076</span>                final Property&lt;?&gt; property = (Property&lt;?&gt;)value;<a name="line.76"></a>
<span class="sourceLineNo">077</span>                if (!property.getPropertyDef().getName().equals(id))<a name="line.77"></a>
<span class="sourceLineNo">078</span>                    continue;<a name="line.78"></a>
<span class="sourceLineNo">079</span>                return property;<a name="line.79"></a>
<span class="sourceLineNo">080</span>            } else<a name="line.80"></a>
<span class="sourceLineNo">081</span>                throw new RuntimeException("internal error: found " + value);<a name="line.81"></a>
<span class="sourceLineNo">082</span>        }<a name="line.82"></a>
<span class="sourceLineNo">083</span>        return null;<a name="line.83"></a>
<span class="sourceLineNo">084</span>    }<a name="line.84"></a>
<span class="sourceLineNo">085</span><a name="line.85"></a>
<span class="sourceLineNo">086</span>    @Override<a name="line.86"></a>
<span class="sourceLineNo">087</span>    @SuppressWarnings("unchecked")<a name="line.87"></a>
<span class="sourceLineNo">088</span>    public Set&lt;String&gt; getItemPropertyIds() {<a name="line.88"></a>
<span class="sourceLineNo">089</span>        final HashSet&lt;String&gt; names = new HashSet&lt;&gt;(this.propertyList.length);<a name="line.89"></a>
<span class="sourceLineNo">090</span>        for (int i = 0; i &lt; this.propertyList.length; i++) {<a name="line.90"></a>
<span class="sourceLineNo">091</span>            final Object value = this.propertyList[i];<a name="line.91"></a>
<span class="sourceLineNo">092</span>            if (value instanceof PropertyDef) {<a name="line.92"></a>
<span class="sourceLineNo">093</span>                final PropertyDef&lt;?&gt; propertyDef = (PropertyDef&lt;?&gt;)value;<a name="line.93"></a>
<span class="sourceLineNo">094</span>                names.add(propertyDef.getName());<a name="line.94"></a>
<span class="sourceLineNo">095</span>            } else if (value instanceof Property) {<a name="line.95"></a>
<span class="sourceLineNo">096</span>                final Property&lt;?&gt; property = (Property&lt;?&gt;)value;<a name="line.96"></a>
<span class="sourceLineNo">097</span>                names.add(property.getPropertyDef().getName());<a name="line.97"></a>
<span class="sourceLineNo">098</span>            } else<a name="line.98"></a>
<span class="sourceLineNo">099</span>                throw new RuntimeException("internal error: found " + value);<a name="line.99"></a>
<span class="sourceLineNo">100</span>        }<a name="line.100"></a>
<span class="sourceLineNo">101</span>        return names;<a name="line.101"></a>
<span class="sourceLineNo">102</span>    }<a name="line.102"></a>
<span class="sourceLineNo">103</span><a name="line.103"></a>
<span class="sourceLineNo">104</span>    /**<a name="line.104"></a>
<span class="sourceLineNo">105</span>     * @throws UnsupportedOperationException always<a name="line.105"></a>
<span class="sourceLineNo">106</span>     */<a name="line.106"></a>
<span class="sourceLineNo">107</span>    @Override<a name="line.107"></a>
<span class="sourceLineNo">108</span>    @SuppressWarnings("rawtypes")<a name="line.108"></a>
<span class="sourceLineNo">109</span>    public boolean addItemProperty(Object id, com.vaadin.data.Property/*&lt;?&gt;*/ property) {<a name="line.109"></a>
<span class="sourceLineNo">110</span>        throw new UnsupportedOperationException();<a name="line.110"></a>
<span class="sourceLineNo">111</span>    }<a name="line.111"></a>
<span class="sourceLineNo">112</span><a name="line.112"></a>
<span class="sourceLineNo">113</span>    /**<a name="line.113"></a>
<span class="sourceLineNo">114</span>     * @throws UnsupportedOperationException always<a name="line.114"></a>
<span class="sourceLineNo">115</span>     */<a name="line.115"></a>
<span class="sourceLineNo">116</span>    @Override<a name="line.116"></a>
<span class="sourceLineNo">117</span>    public boolean removeItemProperty(Object id) {<a name="line.117"></a>
<span class="sourceLineNo">118</span>        throw new UnsupportedOperationException();<a name="line.118"></a>
<span class="sourceLineNo">119</span>    }<a name="line.119"></a>
<span class="sourceLineNo">120</span><a name="line.120"></a>
<span class="sourceLineNo">121</span>    /**<a name="line.121"></a>
<span class="sourceLineNo">122</span>     * Issue {@link com.vaadin.data.Property.ValueChangeEvent}s to all<a name="line.122"></a>
<span class="sourceLineNo">123</span>     * {@link com.vaadin.data.Property.ValueChangeListener}s registered on the specified property of this item.<a name="line.123"></a>
<span class="sourceLineNo">124</span>     *<a name="line.124"></a>
<span class="sourceLineNo">125</span>     * &lt;p&gt;<a name="line.125"></a>
<span class="sourceLineNo">126</span>     * Does nothing if {@code propertyName} is not one of this item's properties.<a name="line.126"></a>
<span class="sourceLineNo">127</span>     * &lt;/p&gt;<a name="line.127"></a>
<span class="sourceLineNo">128</span>     *<a name="line.128"></a>
<span class="sourceLineNo">129</span>     * @param propertyName property ID<a name="line.129"></a>
<span class="sourceLineNo">130</span>     */<a name="line.130"></a>
<span class="sourceLineNo">131</span>    @SuppressWarnings("unchecked")<a name="line.131"></a>
<span class="sourceLineNo">132</span>    public void fireValueChange(String propertyName) {<a name="line.132"></a>
<span class="sourceLineNo">133</span>        for (int i = 0; i &lt; this.propertyList.length; i++) {<a name="line.133"></a>
<span class="sourceLineNo">134</span>            final Object value = this.propertyList[i];<a name="line.134"></a>
<span class="sourceLineNo">135</span>            if (value instanceof Property) {<a name="line.135"></a>
<span class="sourceLineNo">136</span>                final Property&lt;?&gt; property = (Property&lt;?&gt;)value;<a name="line.136"></a>
<span class="sourceLineNo">137</span>                if (property.getPropertyDef().getName().equals(propertyName)) {<a name="line.137"></a>
<span class="sourceLineNo">138</span>                    property.fireValueChange();<a name="line.138"></a>
<span class="sourceLineNo">139</span>                    return;<a name="line.139"></a>
<span class="sourceLineNo">140</span>                }<a name="line.140"></a>
<span class="sourceLineNo">141</span>            }<a name="line.141"></a>
<span class="sourceLineNo">142</span>        }<a name="line.142"></a>
<span class="sourceLineNo">143</span>    }<a name="line.143"></a>
<span class="sourceLineNo">144</span><a name="line.144"></a>
<span class="sourceLineNo">145</span>    /**<a name="line.145"></a>
<span class="sourceLineNo">146</span>     * Issue {@link com.vaadin.data.Property.ValueChangeEvent}s to all<a name="line.146"></a>
<span class="sourceLineNo">147</span>     * {@link com.vaadin.data.Property.ValueChangeListener}s registered on any property of this item.<a name="line.147"></a>
<span class="sourceLineNo">148</span>     */<a name="line.148"></a>
<span class="sourceLineNo">149</span>    @SuppressWarnings("unchecked")<a name="line.149"></a>
<span class="sourceLineNo">150</span>    public void fireValueChange() {<a name="line.150"></a>
<span class="sourceLineNo">151</span>        for (int i = 0; i &lt; this.propertyList.length; i++) {<a name="line.151"></a>
<span class="sourceLineNo">152</span>            final Object value = this.propertyList[i];<a name="line.152"></a>
<span class="sourceLineNo">153</span>            if (value instanceof Property) {<a name="line.153"></a>
<span class="sourceLineNo">154</span>                final Property&lt;?&gt; property = (Property&lt;?&gt;)value;<a name="line.154"></a>
<span class="sourceLineNo">155</span>                property.fireValueChange();<a name="line.155"></a>
<span class="sourceLineNo">156</span>            }<a name="line.156"></a>
<span class="sourceLineNo">157</span>        }<a name="line.157"></a>
<span class="sourceLineNo">158</span>    }<a name="line.158"></a>
<span class="sourceLineNo">159</span><a name="line.159"></a>
<span class="sourceLineNo">160</span>    /**<a name="line.160"></a>
<span class="sourceLineNo">161</span>     * Create a {@link Property} to be used for the given property definition.<a name="line.161"></a>
<span class="sourceLineNo">162</span>     * This method will be invoked at most once for any property; the returned value is cached.<a name="line.162"></a>
<span class="sourceLineNo">163</span>     *<a name="line.163"></a>
<span class="sourceLineNo">164</span>     * &lt;p&gt;<a name="line.164"></a>
<span class="sourceLineNo">165</span>     * The implementation in {@link SimpleItem} returns {@code new Property&lt;V&gt;(propertyDef)}.<a name="line.165"></a>
<span class="sourceLineNo">166</span>     * &lt;/p&gt;<a name="line.166"></a>
<span class="sourceLineNo">167</span>     *<a name="line.167"></a>
<span class="sourceLineNo">168</span>     * @param propertyDef property definition<a name="line.168"></a>
<span class="sourceLineNo">169</span>     * @throws IllegalArgumentException if {@code propertyDef} is null<a name="line.169"></a>
<span class="sourceLineNo">170</span>     */<a name="line.170"></a>
<span class="sourceLineNo">171</span>    protected &lt;V&gt; Property&lt;V&gt; createProperty(PropertyDef&lt;V&gt; propertyDef) {<a name="line.171"></a>
<span class="sourceLineNo">172</span>        return new Property&lt;V&gt;(propertyDef);<a name="line.172"></a>
<span class="sourceLineNo">173</span>    }<a name="line.173"></a>
<span class="sourceLineNo">174</span><a name="line.174"></a>
<span class="sourceLineNo">175</span>// Property<a name="line.175"></a>
<span class="sourceLineNo">176</span><a name="line.176"></a>
<span class="sourceLineNo">177</span>    /**<a name="line.177"></a>
<span class="sourceLineNo">178</span>     * {@link Property} implementation used by {@link SimpleItem}.<a name="line.178"></a>
<span class="sourceLineNo">179</span>     */<a name="line.179"></a>
<span class="sourceLineNo">180</span>    public class Property&lt;V&gt; extends ReadOnlyProperty&lt;V&gt; implements BackedProperty&lt;T, V&gt; {<a name="line.180"></a>
<span class="sourceLineNo">181</span><a name="line.181"></a>
<span class="sourceLineNo">182</span>        private final PropertyDef&lt;V&gt; propertyDef;<a name="line.182"></a>
<span class="sourceLineNo">183</span><a name="line.183"></a>
<span class="sourceLineNo">184</span>        public Property(PropertyDef&lt;V&gt; propertyDef) {<a name="line.184"></a>
<span class="sourceLineNo">185</span>            if (propertyDef == null)<a name="line.185"></a>
<span class="sourceLineNo">186</span>                throw new IllegalArgumentException("null propertyDef");<a name="line.186"></a>
<span class="sourceLineNo">187</span>            this.propertyDef = propertyDef;<a name="line.187"></a>
<span class="sourceLineNo">188</span>        }<a name="line.188"></a>
<span class="sourceLineNo">189</span><a name="line.189"></a>
<span class="sourceLineNo">190</span>        public PropertyDef&lt;V&gt; getPropertyDef() {<a name="line.190"></a>
<span class="sourceLineNo">191</span>            return this.propertyDef;<a name="line.191"></a>
<span class="sourceLineNo">192</span>        }<a name="line.192"></a>
<span class="sourceLineNo">193</span><a name="line.193"></a>
<span class="sourceLineNo">194</span>        @Override<a name="line.194"></a>
<span class="sourceLineNo">195</span>        public T getObject() {<a name="line.195"></a>
<span class="sourceLineNo">196</span>            return SimpleItem.this.object;<a name="line.196"></a>
<span class="sourceLineNo">197</span>        }<a name="line.197"></a>
<span class="sourceLineNo">198</span><a name="line.198"></a>
<span class="sourceLineNo">199</span>        @Override<a name="line.199"></a>
<span class="sourceLineNo">200</span>        public Class&lt;V&gt; getType() {<a name="line.200"></a>
<span class="sourceLineNo">201</span>            return this.propertyDef.getType();<a name="line.201"></a>
<span class="sourceLineNo">202</span>        }<a name="line.202"></a>
<span class="sourceLineNo">203</span><a name="line.203"></a>
<span class="sourceLineNo">204</span>        @Override<a name="line.204"></a>
<span class="sourceLineNo">205</span>        public V getValue() {<a name="line.205"></a>
<span class="sourceLineNo">206</span>            return SimpleItem.this.propertyExtractor.getPropertyValue(SimpleItem.this.object, this.propertyDef);<a name="line.206"></a>
<span class="sourceLineNo">207</span>        }<a name="line.207"></a>
<span class="sourceLineNo">208</span>    }<a name="line.208"></a>
<span class="sourceLineNo">209</span>}<a name="line.209"></a>
<span class="sourceLineNo">210</span><a name="line.210"></a>




























































</pre>
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